Macedonian Journal of Chemistry and Chemical Engineering最新文献_第10页

Synthesis and characterization of a new conjugated polymer containing bithiazole group and its thermal decomposition kinetics 一种新型双噻唑基团共轭聚合物的合成、表征及其热分解动力学

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-11-28 DOI: 10.20450/mjcce.2020.2025

A. Kurt, H. Andan, M. Koca

引用次数: 1

Optimization and kinetic study of anthraquinone dye removal from colored wastewater using soybean seed as a source of peroxidase for environmental welfare 以大豆种子为过氧化物酶源去除有色废水中蒽醌染料的工艺优化及动力学研究

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-11-26 DOI: 10.20450/mjcce.2020.2150

M. Svetozarević, N. Šekuljica, Z. Knežević-Jugović, D. Mijin

引用次数: 3

Extraction kinetic of some phenolic compounds during Cabernet Sauvignon alcoholic fermentation and antioxidant properties of derived wines 赤霞珠酒精发酵过程中某些酚类化合物的提取动力学及衍生葡萄酒的抗氧化性能

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-11-17 DOI: 10.20450/MJCCE.2020.2060

N. Lisov, A. Petrovic, U. Čakar, M. Jadranin, V. Tešević, Ljiljana Bukarica-Gojković

{"title":"Extraction kinetic of some phenolic compounds during Cabernet Sauvignon alcoholic fermentation and antioxidant properties of derived wines","authors":"N. Lisov, A. Petrovic, U. Čakar, M. Jadranin, V. Tešević, Ljiljana Bukarica-Gojković","doi":"10.20450/MJCCE.2020.2060","DOIUrl":"https://doi.org/10.20450/MJCCE.2020.2060","url":null,"abstract":"In this study, we estimated the usage of Cabernet Sauvignon in microvinifications, obtaining wines with increased phenolic compound content. Kinetic extraction of phenolic compounds during alcoholic fermentation was affected by maceration time (3, 5, 7, 14 and 21 days) and the addition and kinetics of enzyme preparations (EP). The highest extraction rates were observed for catechin (EXV EP – EXV enzyme preparation and CP EP – Color plus enzyme preparation) and p -hydroxybenzoic acid (Car EP - Caractere enzyme preparation). According to extraction time of the analyzed phenolic compounds, maximal values (ellagic acid, ferulic acid, chlorogenic acid, caffeic acid, naringenin, p -hydroxybenzoic acid, p -coumaric acid, protocatechuic acid, trans -resveratrol, syringic acid, vanillin, and vanillic acid) were obtained on day 15 of maceration with addition of CP EP, with exceptions of gallic acid, catechin, and myricetin. Prolonged maceration times, up to 21 days, showed the most potent DPPH free radical scavenging activity with Car EP and the highest Ferric Reducing Ability of Plasma (FRAP) values with CP EP.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49350836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Application of voltammetry in biomedicine - Recent achievements in enzymatic voltammetry 伏安法在生物医学中的应用——酶伏安法的最新进展

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-11-12 DOI: 10.20450/mjcce.2020.2152

R. Gulaboski, V. Mirčeski

{"title":"Application of voltammetry in biomedicine - Recent achievements in enzymatic voltammetry","authors":"R. Gulaboski, V. Mirčeski","doi":"10.20450/mjcce.2020.2152","DOIUrl":"https://doi.org/10.20450/mjcce.2020.2152","url":null,"abstract":"Protein-film voltammetry (PFV) is considered the simplest methodology to study the electrochemistry of lipophilic redox enzymes in an aqueous environment. By anchoring particular redox enzymes on the working electrode surface, it is possible to get an insight into the mechanism of enzyme action. The PFV methodology enables access to the relevant thermodynamic and kinetic parameters of the enzyme-electrode reaction and enzyme-substrate interactions, which is important to better understand many metabolic pathways in living systems and to delineate the physiological role of enzymes. PFV additionally provides important information which is useful for designing specific biosensors, simple medical devices and bio-fuel cells. In the current review, we focus on some recent achievements of PFV, while presenting some novel protocols that contribute to a better communication between redox enzymes and the working electrode. Insights to several new theoretical models that provide a simple strategy for studying electrode reactions of immobilized enzymes and that enable both kinetic and thermodynamic characterization of enzyme-substrate interactions are also provided. In addition, we give a short overview to several novel voltammetric techniques, derived from the perspective of square-wave voltammetry, which seem to be promising tools for application in PFV.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43321697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Optimization of electro-Fenton oxidation of carbonated soft drink industry wastewater using response surface methodology 响应面法优化电Fenton氧化碳酸饮料工业废水

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-10-27 DOI: 10.20450/mjcce.2020.2101

R. Davarnejad, J. Azizi, Amir Joodaki, Sepideh Mansoori

引用次数: 2

TiO2/ZnO: Type-II Heterostructures for electrochemical crystal violet dye degradation studies TiO2/ZnO: ii型异质结构对电化学结晶紫染料降解的研究

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-10-26 DOI: 10.20450/mjcce.2020.2058

D. K. Behara, Jalajakshi Tammineni, Mukkara Sudha Maheswari

{"title":"TiO2/ZnO: Type-II Heterostructures for electrochemical crystal violet dye degradation studies","authors":"D. K. Behara, Jalajakshi Tammineni, Mukkara Sudha Maheswari","doi":"10.20450/mjcce.2020.2058","DOIUrl":"https://doi.org/10.20450/mjcce.2020.2058","url":null,"abstract":"Semiconductor nanomaterials with proper band edge alignments forming “heterostructure” assemblies have significant importance in water splitting, dye degradation, and other electrochemical studies. The formed heterojunction between material phases facilitates fast charge carrier transport and, thereby, improves electrochemical performance in associated processes. Herein, we report a type-II heterostructure combining TiO 2 and ZnO nanomaterials for electrochemical crystal violet dye degradation studies. The rationale in choosing the above materials (TiO 2 , ZnO) in the present study includes stability, lack of toxicity, and high oxidation power, but they also facilitate fast charge carrier movements due to proper band edge alignments, forming a type-II heterostructure assembly. Cyclic voltammetry, combined with ultraviolet-visible analysis, was used to identify the cathodic and anodic peak currents and trace the exact mechanism of dye degradation. The electro-catalytic performance of TiO 2 /ZnO heterostructured materials fabricated on titania (Ti) substrate show higher performance, in comparison to all individual material interfaces, due to synergistic interaction and synchronized charge transport.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46787455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Corrosion protection of tin by some carboxylic acids in sodium chloride solution 几种羧酸对锡在氯化钠溶液中的防腐作用

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-10-26 DOI: 10.20450/mjcce.2020.2112

Ivana Škugor Rončević, Nives Vladislavić, M. Buzuk, Maša Buljac, A. Lukin

引用次数: 0

Voltammetric determination of resveratrol using poly(l-phenylalanine)-modified gold electrode 聚l-苯丙氨酸修饰金电极伏安法测定白藜芦醇

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-10-14 DOI: 10.20450/mjcce.2020.2073

Öznur Güngör, C. Ben Ali Hassine, Muammer Burç, Serap Titretir Duran

引用次数: 2

Microbial potentiometric sensor technology for real-time detecting and monitoring of toxic metals in aquatic matrices 用于水生基质中有毒金属实时检测和监测的微生物电位传感器技术

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-10-14 DOI: 10.20450/mjcce.2020.2088

F. Brown, S. Burge, K. Hristovski, R. Burge, Evan Taylor, D. Hoffman

{"title":"Microbial potentiometric sensor technology for real-time detecting and monitoring of toxic metals in aquatic matrices","authors":"F. Brown, S. Burge, K. Hristovski, R. Burge, Evan Taylor, D. Hoffman","doi":"10.20450/mjcce.2020.2088","DOIUrl":"https://doi.org/10.20450/mjcce.2020.2088","url":null,"abstract":"Considering that toxic metals can affect metabolic processes in microorganisms adversely, it can be hypothesized that these metals in water matrices would induce a decrease in metabolic activity of the biofilm microorganisms populating the surface of a sensing electrode, which could be registered as a change in the open-circuit potential (OCP) generated by the biofilm microorganisms. The goal of this study was to test this hypothesis and demonstrate the underlying principle that microbial potentiometric sensor (MPS) technology could be used for long-term and real-time monitoring and detection of rapid changes in metal concentrations in realistic aquatic environments. To address the goal, four objective were addressed: (1) a batch reactor with three graphite-based MPS electrodes was fabricated; (2) a set of single-ion solutions and one multiple ion solution were prepared reflecting realistic concentrations of metals found in electroplating wastewaters; (3) the responses of the MPS to the simultaneous presence of multiple toxic metal ions in a single solution were measured; and (4) the changes of the MPS signals to the presence of individual metal ion solutions were examined. While the hypothesis was validated, the study also revealed that the MPS was sufficiently sensitive to not only detect, but also quantify, toxic metal ion concentrations in aqueous solutions. The coefficients of determination, which were R 2 >0.995, and responsiveness of Cd>Pb>Ag>Ni> Zn. The study provides valuable information for enforcement agents, environmental professionals, and wastewater treatment operators, so toxic metal pollution and its detrimental impacts can be prevented and mitigated.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43558955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Highly sensitive detection of Cr(VI), Pb(II) and Cd(II) ions by a new fluorescent sensor based on 4-amino-3-hydroxynaphthalene sulfonic acid-doped polypyrrole 基于4-氨基-3-羟基萘磺酸掺杂聚吡咯的新型荧光传感器对Cr(VI)、Pb(II)和Cd(II)离子的高灵敏度检测

IF 1 4区化学

Macedonian Journal of Chemistry and Chemical Engineering Pub Date : 2020-10-14 DOI: 10.20450/mjcce.2020.1978

M. L. Sall, A. Diaw, D. Gningue-Sall, M. Oturan, J. Aaron

{"title":"Highly sensitive detection of Cr(VI), Pb(II) and Cd(II) ions by a new fluorescent sensor based on 4-amino-3-hydroxynaphthalene sulfonic acid-doped polypyrrole","authors":"M. L. Sall, A. Diaw, D. Gningue-Sall, M. Oturan, J. Aaron","doi":"10.20450/mjcce.2020.1978","DOIUrl":"https://doi.org/10.20450/mjcce.2020.1978","url":null,"abstract":"A new electrosynthesized, fluorescent 4-amino-3-hydroxynaphthalene-1-sulfonic acid-doped polypyrrole (AHNSA-PPy) was used for the detection of Cr(VI), Pb(II) and Cd(II) heavy metallic ions. The optical properties of AHNSA-PPy were studied by UV-VIS absorption and fluorescence spectrometry in diluted DMSO solutions. UV-VIS spectrum showed a main band at 260 nm, a moderate band at 240 nm, and shoulders at 285, 295, 320 and 360 nm, whereas the fluorescence spectrum presented an excitation peak at 330 nm and a main emission peak at 390 nm with a shoulder at 295 nm. The effects of heavy metallic ions, including Cr(VI), Pb(II), and Cd(II), on the AHNSA-PPy UV-VIS absorption and fluorescence spectra were investigated. AHNSA-PPy fluorescence spectra were strongly quenched upon increasing the Cr(VI), Pb(II) and Cd(II) concentrations. Linear Stern-Volmer relationships were established, and polynomial equations for Pb(II) and Cd(II) were obeyed, indicating the existence of a AHNSA-PPy dynamic fluorescence quenching mechanism for Cr(VI) and a combination of dynamic and static fluorescence quenching for Pb(II) and Cd(II). The AHNSA-PPy sensor showed high sensitivity for fluorescence detection of the three heavy metallic ions, with very low limits of detection (3σ) of 1.4 nM for Cr(VI), 2.7 nM for Cd(II) and 2.6 nM for Pb(II). Therefore, this very sensitive quenching fluorimetric sensor is proposed for the detection of trace, toxic heavy metallic ions in the environment.","PeriodicalId":18088,"journal":{"name":"Macedonian Journal of Chemistry and Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47466337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3